210039-65-9Relevant articles and documents
The influence of imine structure, catalyst structure and reaction conditions on the enantioselectivity of the alkylation of alanine methyl ester imines catalyzed by Cu(ch-salen)
Belokon', Yuri N.,Davies,Fuentes, Jose A.,North, Michael,Parsons, Teresa
, p. 8093 - 8096 (2001)
Systematic variation of the substrate structure has shown that the most effective substrates for Cu(ch-salen)-catalyzed asymmetric enolate alkylation reactions carried out under phase-transfer conditions are the para-chlorophenyl imines of amino esters. T
Dibenzazepines and dibenzoxazepines as sodium channel blockers
Lynch, Stephen M.,Tafesse, Laykea,Carlin, Kevin,Ghatak, Parijat,Kyle, Donald J.
, p. 43 - 47 (2015)
We have identified two related series of dibenzazepine and dibenzoxazepine sodium channel blockers, which showed good potency on Nav1.7 in FLIPR-based and electrophysiological functional assays.
Phosphine-catalyzed sequential (2+3)/(2+4) annulation of γ-vinyl allenoates: Access to the synthesis of chromeno[4,3-: B] pyrroles
Huang, You,Li, Xiaohu
supporting information, p. 9934 - 9937 (2021/10/12)
A phosphine-catalyzed cascade (2+3)/(2+4) cyclization reaction of γ-vinyl allenoates with aldimine esters has been developed to provide a series of chromeno[4,3-b]pyrrole derivatives that contain three contiguous stereogenic centers. The method gives a good yield, excellent chemoselectivity and diastereoselectivity under mild conditions.
Ru-based complexes as heterogeneous potential catalysts for the amidation of aldehydes and nitriles in neat water
Arafa, Wael Abdelgayed Ahmed
, p. 1056 - 1064 (2020/11/09)
Five novel heterogeneous mononuclear complex-anchored Ru(III) have been efficiently sono-synthesized and characterized by utilizing several analytical techniques. The assembled complexes could be utilized as effective, robust and recyclable (up to eight consecutive runs) catalysts for one-pot transformation of a vast array of nitriles and aldehydes to primary amides in H2O under aerobic conditions. Moreover, some unreported di- and tetra-amide derivatives were obtained also under the optimal conditions. The results of ICP/OES analysis demonstrated that there is no detected leaching of the recycled catalyst, which suggests the real heterogeneity of the present protocol. The present Ru-complexes exhibited superiority compared to other reported catalysts for amide preparation in terms of low catalyst load, short reaction time, low operating temperature, no hazardous additives required, and high values of TON (990) and TOF (1980 h11).
Unprecedented reductive cyclisation of salophen ligands to tetrahydroquinoxalines during metal complex formation
Dowsett, Mark R.,Lamb, Katie J.,North, Michael,Parker, Rachel R.,Whitwood, Adrian C.
supporting information, p. 4844 - 4847 (2020/05/13)
The synthesis of novel tetrahydroquinoxalines by a metal induced one-electron reductive cyclisation of salophen ligands was found to occur when a salophen ligand was treated with chromium(ii) chloride or decamethylcobaltocene.
Effects of Substituents on Metastable-State Photoacids: Design, Synthesis, and Evaluation of their Photochemical Properties
Liu, Junning,Tang, Wenqi,Sheng, Lan,Du, Zhen,Zhang, Ting,Su, Xing,Zhang, Sean Xiao-An
supporting information, p. 438 - 445 (2019/01/08)
Recently, metastable-state photoacids have been widely used to control proton transfer in numerous chemical and biological processes as well as applications with visible light. Generally, substituents have a great influence on the photochemical properties of molecules, which will further affect their applications. Yet, the effects of substituents on metastable-state photoacids have not been studied systematically. In this work, 16 metastable-state photoacid derivatives were designed and synthesized on the basis of substituents having a large range of σ–π electron–donor–acceptor capabilities. The effects of substituents on the color display [or maximum absorption band(s)], solubility, pKa values, dark/photoacidity, photosensitivity, and relaxation kinetic(s) were investigated in detail. This study will be helpful for the targeted design and synthesis of promising photoacids and the application of their photocontrolled proton-release processes in functional materials/devices.
Spiropyrans and spirooxazines and preparation method thereof
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Paragraph 0061; 0064; 0065, (2019/01/22)
The invention provides spiropyrans, naphthospiropyrans and spirooxazines. The invention also relates to a method for preparing the spiropyrans, the naphthospiropyrans and the spiroxazines by reactionof indole compounds, especially indole iodide, with alde
Coordination-Induced Spin-State Switching with Nickel(II) salpn Complexes: Electronic versus Steric Effects and Influence of Intermolecular Interactions
Brandenburg, Hannah,Krahmer, Jan,Fischer, Kim,Schwager, Bettina,Fl?ser, Benedikt,N?ther, Christian,Tuczek, Felix
, p. 576 - 585 (2018/02/06)
Four nickel(II) salpn (salicylidenepropylene iminate) complexes are investigated concerning their capability to perform CISSS (coordination-induced spin-state switching). To this end, pyridine titration experiments are performed with the nickel salpn comp
Pd-Catalyzed Ortho C-H Hydroxylation of Benzaldehydes Using a Transient Directing Group
Chen, Xiao-Yang,Ozturk, Seyma,Sorensen, Erik J.
supporting information, p. 6280 - 6283 (2017/12/08)
The direct Pd-catalyzed ortho C-H hydroxylation of benzaldehydes was achieved using 4-chloroanthranilic acid as the transient directing group, 1-fluoro-2,4,6-trimethylpyridnium triflate as the bystanding oxidant, and p-toluenesulfonic acid as the putative oxygen nucleophile. The unusual C-H chlorination and polyfluoroalkoxylation reactions signaled the importance of external nucleophiles to the outcome of Pd(IV) reductive eliminations.
Enantioselective synthesis of 2,3-disubstituted: Trans -2,3-dihydrobenzofurans using a Br?nsted base/thiourea bifunctional catalyst
Barrios Antúnez, Diego-Javier,Greenhalgh, Mark D.,Fallan, Charlene,Slawin, Alexandra M. Z.,Smith, Andrew D.
supporting information, p. 7268 - 7274 (2016/08/05)
The diastereo- and enantioselective synthesis of 2,3-disubstituted trans-2,3-dihydrobenzofuran derivatives (15 examples, up to 96 : 4 dr, 95 : 5 er) via intramolecular Michael addition has been developed using keto-enone substrates and a bifunctional tertiary amine-thiourea catalyst. This methodology was extended to include non-activated ketone pro-nucleophiles for the synthesis of 2,3-disubstituted indane and 3,4-disubstituted tetrahydrofuran derivatives.